OA16745A - Polyester-based fiber for artificial hair, method for producing the same, and bundle for hair and hair ornament product including the same. - Google Patents
Polyester-based fiber for artificial hair, method for producing the same, and bundle for hair and hair ornament product including the same. Download PDFInfo
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- OA16745A OA16745A OA1201400080 OA16745A OA 16745 A OA16745 A OA 16745A OA 1201400080 OA1201400080 OA 1201400080 OA 16745 A OA16745 A OA 16745A
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- Prior art keywords
- hair
- polyester
- fiber
- polyester resin
- fibers
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- 239000000835 fiber Substances 0.000 title claims abstract description 192
- 229920000728 polyester Polymers 0.000 title claims abstract description 100
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 229920001225 Polyester resin Polymers 0.000 claims abstract description 85
- 239000004645 polyester resin Substances 0.000 claims abstract description 85
- 239000003063 flame retardant Substances 0.000 claims abstract description 55
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 50
- 150000001875 compounds Chemical class 0.000 claims abstract description 27
- 238000002844 melting Methods 0.000 claims abstract description 21
- 238000009835 boiling Methods 0.000 claims abstract description 20
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 18
- 229920001283 Polyalkylene terephthalate Polymers 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- IISBACLAFKSPIT-UHFFFAOYSA-N Bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 21
- 229920002821 Modacrylic Polymers 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 239000011528 polyamide (building material) Substances 0.000 claims description 5
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 102000004169 proteins and genes Human genes 0.000 claims description 5
- 108090000623 proteins and genes Proteins 0.000 claims description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 230000002349 favourable Effects 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- -1 polyethylene terephthalate Polymers 0.000 description 20
- 239000000203 mixture Substances 0.000 description 18
- 229920000139 polyethylene terephthalate Polymers 0.000 description 13
- 239000005020 polyethylene terephthalate Substances 0.000 description 13
- 235000004879 dioscorea Nutrition 0.000 description 12
- 238000004898 kneading Methods 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000002074 melt spinning Methods 0.000 description 10
- 230000004927 fusion Effects 0.000 description 9
- 239000003638 reducing agent Substances 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- VEORPZCZECFIRK-UHFFFAOYSA-N Tetrabromobisphenol A Chemical compound C=1C(Br)=C(O)C(Br)=CC=1C(C)(C)C1=CC(Br)=C(O)C(Br)=C1 VEORPZCZECFIRK-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000007334 copolymerization reaction Methods 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- WXZMFSXDPGVJKK-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
- BSWWXRFVMJHFBN-UHFFFAOYSA-N 2,4,6-Tribromophenol Chemical compound OC1=C(Br)C=C(Br)C=C1Br BSWWXRFVMJHFBN-UHFFFAOYSA-N 0.000 description 3
- JHJUYGMZIWDHMO-UHFFFAOYSA-N 2,6-dibromo-4-(3,5-dibromo-4-hydroxyphenyl)sulfonylphenol Chemical compound C1=C(Br)C(O)=C(Br)C=C1S(=O)(=O)C1=CC(Br)=C(O)C(Br)=C1 JHJUYGMZIWDHMO-UHFFFAOYSA-N 0.000 description 3
- 102100014160 FEV Human genes 0.000 description 3
- 101700032330 FEV Proteins 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920001707 polybutylene terephthalate Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-Propanediol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N 1,4-Butanediol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical compound O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 description 2
- MTHSVFCYNBDYFN-UHFFFAOYSA-N Diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (-)-propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-Tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N 1,6-Hexanediol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 125000005274 4-hydroxybenzoic acid group Chemical group 0.000 description 1
- BDJRBEYXGGNYIS-UHFFFAOYSA-N Azelaic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 1
- 241000202785 Calyptronoma Species 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- UNXHWFMMPAWVPI-QWWZWVQMSA-N D-Threitol Natural products OC[C@@H](O)[C@H](O)CO UNXHWFMMPAWVPI-QWWZWVQMSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 229920004943 Delrin® Polymers 0.000 description 1
- 239000004386 Erythritol Substances 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N Erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 229940009714 Erythritol Drugs 0.000 description 1
- ACKALUBLCWJVNB-UHFFFAOYSA-N Ethylidene diacetate Chemical compound CC(=O)OC(C)OC(C)=O ACKALUBLCWJVNB-UHFFFAOYSA-N 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-N Isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 1
- 229940117969 NEOPENTYL GLYCOL Drugs 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N Phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229960004063 Propylene glycol Drugs 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000003078 antioxidant Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 230000001747 exhibiting Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N phosphonic acid group Chemical group P(O)(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Abstract
The present invention provides a polyesterbased fiber for artificial hair having high flame retardance and also having favorable heat resistance, a method for producing the polyesterbased fiber for artificial hair, and a fiber bundle for hair and a hair ornament product including the polyester-based fiber for artificial hair. A polyesterbased fiber for artificial hair of the present invention includes a polyester resin and a brominated epoxy flame retardant. The polyester resin is polyalkylene terephthalate and/or a copolymerized polyester containing polyalkylene terephthalate as the main component. The polyester resin has an intrinsic viscosity of 0.3 to 0.5. A method for producing the polyester-based fiber for artificial hair preferably includes a step of reducing the intrinsic viscosity of the polyester resin using a sugar alcohol and/or a bisphenolbased compound containing two or more hydroxyl groups in the molecule and having a melting point of 80°C or more and a boiling point of 260°C or more.
Description
1. Field of the Invention
The présent invention relates to a polyester-based fiber for artificial hair capable of being used as an alternative to human hair, a method for producing the polyester-based fiber for artificial haïr, and a fiber bundle for hair and a hairomament product including the polyester-based fiber for artificial hair. Specifically, the présent invention relates to a polyester-based fiberfor artificial hair having high flame retardance and also having favorable heat résistance, a method for producing the polyester-based fiber for artificial hair, and a fiber bundle for hair and a hair omament product including the polyester-based fiber for artificial hair.
2. Description of Related Art
In hair omament products such as a hairpieœ, a hair wig, crepe hair, a hair band, and doll hair, human hair has been conventionally used. However, in reoent years, it is becoming difficult to obtain human hair, and the importance offibers for artificial hair, instead of human hair, is increasing. Modacrylîc fibers hâve often been used as fiber materials for artificial hair because of their flame retardance, but the heat résistance of the modacrylîc fibers has been insuffident. Thus, it has been proposed to use polyester-based fibers containing polyethylene terephthalate as the main component, which has excellent heat résistance, as fibers for artifidal haïr. In addition, since polyester-based fibers for use as fibers for artificial hair are also required to hâve flame retardance for the sake of safety, various attempts hâve been made to impart flame retardance to the polyester-based fibers. For example, JP 2005-42234A, JP 2005-264397A, WO 2005/056894, and JP
2007-131982A hâve proposed flame retardant polyester-based fibers obtained by incorporating a brominated epoxy flame retardant into a polyester-based fiber.
SUMMARY OF THE INVENTION
However, although the flame retardance ofthe flame retardant polyester-based fibers disclosed in JP 2005-42234A, JP 2005-264397A, WO 2005/056894, and JP 2007-131982A has been improved by incorporating a brominated epoxy flame retardant into the fibers, the heat résistance ofthe fibers has been insuffident in some cases. Thus, the fibers were easily caused to shrink by heat, and there hâve been cases where the fibers were softened or crimped during setting with a hair iron at a high température.
In order to solve the above-described conventional problems, the présent invention provides a polyester-based fiber for artifidal hair having high flame retardance and also having favorable heat résistance, 15 a method for produdng the polyester-based fiber for artifidal hair, and a fiber bundle for hair and a hair omament product induding the polyester-based fiber for artifidal hair.
The présent invention relates to a polyester-based fiber for artifidal hair induding a polyester resin and a brominated epoxy flame retardant, wherein the polyester resin is at least one resin selected from the group consisting of polyalkylene terephthalate and copolymerized polyesters containing polyalkylene terephthalate as the main component, and the polyester resin has an intrinsic viscosity of 0.3 to 0.5.
In the polyester-based fiber for artificial hair, it is préférable that the brominated epoxy flame retardant has a number-average molecular weight of 1000 to 20000. Moreover, it is préféra ble that the polyester-based fiber for artificial hair includes 0.1 parts by weight or more and less than 5 parts by weight of a viscosity-redudng agent with respect to 100 parte by weight of the polyester resin, the visoosity-reducing agent being a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more.
The présent invention also relates to a method for produdng the polyester-based fiber for artifidal hair, the method induding a step of redudng the intrinsic viscosity of a polyester resin using a visoosity-redudng 10 agent, the viscosity-redudng agent being a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260’Cormore.
The présent invention also relates to a fiber bundle for hair induding the polyester-based fiber for artifidal hair and at least one fiber selected from the group consisting of human hair, animal haïr, polyvinyl 15 chloride-based fibers, modacrylic fibers, polyamide-based fibers, polyolefin-based fibers, regenerated protein fibers, and other polyester-based fibers.
The présent invention also relates to a hair omament product induding the polyester-based fiber for artifidal hair.
The hair omament product may further indude at least one fiber selected from the group consisting of human hair, animal hair, polyvinyl chloride-based fibers, modacrylicfibers, polyamide-based fibers, polyolefin-based fibers, regenerated protein fibers, and other polyester-based fibers.
According to the présent invention, in the polyester-based fiber for artificial hair including the polyester resin and the brominated epoxy flame retardant, the intrinsic visoosity of the polyester resin is set to a range of
0.3 to 0.5. Thus, the présent invention provides a polyester-based fiber for artificial hair, a fiber bundle for haïr, and a hair omament product that have high flame retardance and also have favorable heat résistance.
DETAILED DESCRIPTION OFTHE INVENTION
The inventors of the présent invention have conducted numerous studiesto solve the above problems and found that when, in a polyester-based fiber for artificial hair induding a polyester resin and a brominated epoxy flame retardant, the intrinsic viscosity (IV) of the polyester resin is set within a range of 0.3 to 0.5, heat résistance is improved while high flame retardance is maintained. Thus, the présent invention was accomplished. Moreover, the inventors of the présent invention found that using a brominated epoxy flame retardant having a low number-average molecular weight, In particular, a brominated epoxy flame retardant having a number-average molecular weight of 1000 to 20000, in addition to setting the intrinsic viscosity of the polyester resin within a range of 0.3 to 0.5 improves color development while maintaining high flame retardance and heat résistance. Furthermore, the inventors of the présent invention found that a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more serves as a viscosity-redudng agent and has an effect of redudng the intrinsic viscosity of the polyester resin. When a polyester resin having an intrinsic viscosity of more than 0.5 is used as a raw material polyester resin, and an adjustment is made so that the intrinsic viscosity of the polyester resin after being processed into fiber is within a range of 0.3 to 0.5 by redudng the intrinsic viscosity of the raw material polyester resin by using a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more, in particular, by încorporating 0.1 parts by weight or more and less than 5 parts by weight of the sugar alcohol and/or the bisphenoi-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260qC or more with respect to 100 parts by weight of the polyester resin, a polyester-based fiber for artifidal haïr having good spinning properties and excellent flame retardanœ, heat résistance, and color development can be produced.
The polyester-based fiber for artifidal hair of the présent invention is oomposed of a polyester resin composition induding a polyester resin, a brominated epoxy flame retardant, and the like.
The polyester resin is at least one resin selected from the group consisting of polyalkylene terephthalate and copolymerized polyesters containing polyalkylene terephthalate as the main component. The polyalkylene terephthalate is not particularly limited and may be, for example, polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, or polycydohexane dimethylene terephthalate. The copolymerized polyesters containing polyalkylene terephthalate as the main component are not particularly limited and may be, for example, copolymerized polyesters containing polyalkylene terephthalate such as polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, or polycydohexane dimethylene terephthalate as the main component and other copolymerizable components. In the présent invention, the term “main component’ means a component that is contained in an amount of 80 mol% or more. Thus, the copolymerized polyesters containing polyalkylene terephthalate as the main oomponent refers to the copolymerized polyesters containing 80 mol% or more of polyalkylene terephthalate.
Examples of the other copolymerizable components include the following: polycarboxylic acids such as isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, paraphenylenedicarboxylic acid, tri mellitic add, pyromellitic add, sucanic add, glutaric add, adipic add, suberic add, azelaic add, sebadc add, and dodecanedioic add, and their dérivatives; dicarboxylic adds induding a sulfonic add sait such as
5-sodiumsulfoisophthalïc add and dihydroxyethyl 5-sodiumsulfoisophthalate, and their dérivatives;
1,2-propanediol; 1,3-propanediol; 1,4-butanediol; 1,6-hexanediol; neopentyl glycol;
1,4-cydohexanedimethanol; diethylene glycol; polyethylene glycol; trimethylolpropane; pentaerythritol;
4-hydroxybenzoic add; and ε-caprolactone.
Spécifie examples of the copolymerized polyesters containing polyalkylene terephthalate as the main component indude copolymerized polyesters obtained by copolymerization of polyethylene terephthalate as the main component with one compound selected from the group consisting of ethylene glycol ether of bisphenol A, 1,4-cydohexanedimethanol, isophthalic add, and dihydroxyethyl 5-sodiumsulfoisophthalate.
The polyalkylene terephthalate and/or the copolymerized polyesters containing polyalkylene terephthalate as the main component may be used atone or in a combination of two or more. In partîcular, it is préférable that polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, a copolymerized polyester obtained by copolymerization of polyethylene terephthalate as the main component with ethylene glycol ether of bisphenol A, a copolymerized polyester obtained by copolymerization of polyethylene terephthalate as the main component with 1,4-cydohexanedimethanol, a copolymerized polyester obtained by copolymerization of polyethylene terephthalate as the main component with isophthalic add, and a copolymerized polyester obtained by oopolymerization of polyethylene terephthalate as the main component with dihydnoxyethyl 5-sodiumsulfoisophthalate are used alone or in a oombination of two or more.
In the polyester-based fiber for artifidal hair, the intrinsîc viscosity of the polyester resin, that is, frie intrinsic viscosity of the polyester resin after being processed into fiber is 0.3 to 0.5, preferably 0.35 to 0.5, and more preferably 0.4 to 0.5. When the polyester resin in the polyester-based fiberforartifidal hair has an intrinsic viscosity of 0.3 or more, the polyester-based fiber for artifidal hair has excellent flame retardance and does not drip during a combustion test. In addition, the polyester-based fiber for artifidal hair also has excellent heat résistance and is not softened during setting with a hair iron at a high température. When the polyester resin in the polyester-based fiberfor artifidal hair has an intrinsic viscosity of 0.5 or less, the polyester-based fiber for artifidal hair has excellent heat résistance and is not easily caused to shrink by heat Thus, frie fiber is not likely to be crimped during setting with a hair iron at a high température.
In the présent invention, the intrinsic viscosity of the polyester resin that Is used as the raw material (before being processed into fiber) may be seleded as appropriate so that the polyester resin in the fiber (after being processed into fiber) has an intrinsic viscosity of 0.3 to 0.5, and is not particularly limited. As will be described later, in the case where a viscosity-redudng agent is used to reduce the intrinsic viscosity of the polyester resin, the intrinsic viscosity of the polyester resin before being processed into fiber is preferably 0.4 or more, more preferably 0.5 or more, and even more preferably 0.6 or more.
Although there is no particular limitation to the brominated epoxy flame retardant, for example, it is possible to use as a raw material a brominated epoxy flame retardant having an epoxy group, tribromophenol, tetrabromobisphenol A, or the like at the end of the molécule.
Specifically, the brominated epoxy flame retardant may be a compound including a structural formula represented by general formula (1 ) below in the molécule.
Chemical Formula 1
In general formula (1) above, m is 1 to 1000.
The brominated epoxy flame retardant preferably has a number-average molecular weight of 1000 to 20000, more preferably 2000 to 15000, and even more preferably 2000 to 10000. When the brominated epoxy flame retardant has a number-average molecular weight within the above-described range, the brominated epoxy flame retardant is easily dispersed In the polyester resin, resulting in favorable color development and also excellent spinning stability.
From the standpoint of preventing fiber fusion, it is préférable that the brominated epoxy flame retardant has tribromophenol and/or tetrabromobisphenol A, more preferably tetrabromobisphenol A, at the end of the molécule. When a brominated epoxy flame retardant having a low number-average molecular weight has an epoxy group at the end ofthe molécule, the reactivity with the polyester resin is excessively high.
Thus, a gel îs generated during melt kneading and/or melt spinning, and there is a risk that fiber fusion may occur. In contrast, when a brominated epoxy flame retardant having a low number-average molecular weight has tribnomophenol and/or tetrabromobisphenol A at the end of the molécule, the reacti vrty with the polyester resin is not high. Thus, génération of the gel during melt kneading and/or melt spinning is suppressed, and fiber fusion is unlikely to occur.
In the présent invention, a brominated epoxy flame retardant having the above-described structure at frie end of the molécule is used as the raw material. However, there is no particular limitation to the structure of the brominated epoxy flame retardant after melt kneading and/or melt spinning. For example, the end of the molécule of the brominated epoxy flame retardant may be replaced by an epoxy group, a hydroxyl group, 10 a phosphoric acid group, or a phosphonic acid group. Altematively, the end of frie molécule ofthe brominated epoxy flame retardant may be bound to the polyester resin through an ester group.
The brominated epoxy flame retardants may be used alone or in a combination of two or more.
Preferably, the polyester-based fiber for artificial hair indudes 5 to 40 parts by weight ofthe brominated epoxy flame retardant with respect to 100 parts by weight ofthe polyester resin. More preferably, 15 the polyester-based fi ber for artifidal hair indudes 5 to 30 parts by weight and even more preferably 6 to 25 parts by weight of the brominated epoxy flame retardant with respect to 100 parts by weight of the polyester resin. When the content ofthe brominated epoxy flame retardant is within the above-described range, the polyester-based fiber for artifidal hair has excellent flame retardanœ, color development, and spinning properties.
Preferably, the polyester-based fiber for artificial hair includes 0.1 parts by weight or more and less than 5 parts by weight of a viscosity-redudng agent with respect to 100 parts by weight of the polyester resin.
More preferably, the polyester-based fiber for artificial hair includes 0.2 to 4 parts by weight, even more preferably 0.4 to 3 parts by weight, and particularly preferably 0.8 to 3 parts by weight of the viscosity-redudng agent with respect to 100 parts by weight of the polyester resin.
The viscosity-redudng agent is a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more. In the présent invention, the sugar alcohol and/or the bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more has an effect of redudng the intrinsic viscosity ofthe polyester resin, and improves the heat résistance and color development of the polyester-based fiber for artifidal hair by redudng the intrinsic visoosity of the polyester resin. When two or more hydroxyl groups are présent in the molécule, the sugar alcohol and/or the bisphenol-based compound has good reactivity with the polyester resin and easily reduces the intrinsic viscosity of the polyester resin. Moreover, when the melting point is 80°C or more, the sugar alcohol and/or the bisphenol-based compound does not décomposé during steps such as melt kneading or melt spinning of the polyester resin composition, and can exert the function of a viscosity-redudng agent. Furthermore, when the boiling point is 260°C or more, the sugar aloohol and/or the bisphenol-based compound does not function as a plastidzer and functions as a viscosity-redudng agent, and thus the heat résistance of the polyester-based fiber for artifidal hair is not reduced.
The sugar alcohol that is used as the viscosity-redudng agent may be any sugar alcohol containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more, and is not particularly limited. Examples thereof include erythritol, pentaerythritol, and sorbitol. More preferably, the sugar alcohol that is used as the viscosity-redudng agent has a melting point of 120°C or more. Also, it is more préférable that the sugar alcohol that is used as the viscosity-reducing agent has a boiling point of 270°C or more.
The bisphenol-based compound that is used as the viscosity-reducing agent may be any bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more, and is not particularly limited. Examples thereof include tetrabromobisphenol A and tetrabromobisphenol S. More preferably, the bisphenol-based compound 10 that is used as the visoosity-reducing agent has a melting point of 120°C or more. Also, it is more préférable that the bisphenol-based compound that is used as the viscosity-reducing agent has a boiling point of 270°C or more.
With regard to the viscosity-redudng agent, a single compound may be used alone, or two or more compounds may be used in combination.
The sugar alcohols and frie bisphenol-based compounds that are used as the viscosity-redudng agent may be présent in a state in which they are bound to the polyester resin through an ester bond in the polyester-based fiber for artifidal hair.
The polyester-based fiber for artifidal hair may contain various kinds of additives such as a flame retardant other than the brominated epoxy flame retardant, a flame retardant auxiliary, a stabilizer, a fluorescent agent, an antioxidant, and an antistatic agent as needed without impeding the effects ofthe présent invention.
The polyester-based fiber for artificial hair of the présent invention can be obtained by, for example, melt spinning a polyester resin composition containing a polyester resin and a brominated epoxy flame retardant by an ordinary melt spinning method. The polyester resin composition can be obtained by dry blending each ofthe above-described components such as the polyester resin, the brominated epoxy flame retardant, and the viscosity-reducing agent, and melt kneading the mixture using various general kneading machines. Examples ofthe kneading machines include a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, and a kneader. In particular, the twin-screw extruder is preferred in terms of the adjustment of the degree of kneading and the ease of operation. Melt kneading is preferably performed at a température of not lower than the melting point of the polyester resin, for example, at a température of 250 to 280°C, although there is no limitation thereto.
Preferably, the polyester resin composition includes 5 to 40 parts by weight ofthe brominated epoxy flame retardant with respectto 100 parts by weight of the polyester resin. More preferably, the polyester resin composition includes 5 to 30 parts by weight and even more preferably 6 to 25 parts by weight of the brominated epoxy flame retardant with respect to 100 parts by weight of the polyester resin. In addition, the polyester resin composition preferably includes 0.1 parts by weight or more and less than 5 parts by weight, more preferably 0.2 to 4 parts by weight, even more preferably 0.4 to 3 parts by weight, and particularly preferably 0.8 to 3 parts by weight of the viscosity-reducing agent with respect to 100 parts by weight of the polyester resin.
The polyester-based fiber for artificial hair is preferably produced by melt kneading the polyester resin composition induding the polyester resin, the brominated epoxy flame retardant, and the viscosity-reduang agent and melt spinning the melt-kneaded polyester resin composition. When a polyester resin having an intrinsic visoosity of more than 0.5 is used as a raw material polyester resin, and an adjustment is made by redudng this intrinsic visoosity using a sugar alcohol and/or a bisphenol-based compound containing two or more hydnoxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more so that the polyester resin after being processed into fiber has an intrinsic viscosity within a range of 0.3 to 0.5, a polyester-based fiber for artificial hair having good spinning properties and exhibiting excellent flame retardance, heat résistance, and color development can be produced. When the polyester resin composition indudes the sugar alcohol and/or the bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more (viscosity-redudng agent), the viscosity-reduang agent reducesthe intrinsic viscosity ofthe polyester resin during melt kneading and/or melt spinning.
In the case where the polyester-based fiber for artificial hair of the présent invention is produced by melt spinning by perfomning an ordinary melt spinning method, for example, the polyester resin composition is melt spun into yams while the températures of an extrader, a gear pump, a spinneret, and the like are set to 250 to 310°C. Then, the obtained yams are cooled to a température of not more than the glass transition point ofthe polyester resin, and wound up at a speed of 50 to 5000 m/min, and thus spun yams (undrawn yams) are obtained. Moreover, the spun yams may also be cooled in a water bath oontaining cooling water so as to control the fineness. The température and amount of the cooling air applied, the température of the cooling water bath, the cooling time, and the winding speed can be adjusted appropriately in accordance with the extrusion rate of the polymer and the number of holes of the spinneret.
In the présent invention, it is préférable that the obtained spun yams (undrawn yams) are hot drawn. The drawing may be performed by either a two-step method or a direct drawing method. In the two-step method, the spun yams are onœ wound, and then drawn. In the direct drawing method, the spun yams are drawn continuously without winding. The hot drawing may be performed by a single-stage drawing method or a mufti-stage drawing method that includes two or more stages. The heating means for the hot drawing may be a heating roller, a heat plate, a steam jet apparatus, or a hot water bath, and they can be used in combination as desired.
It is préférable that the polyester-based fiber for artificial hair of the présent invention is a fiber like non-crimped raw silk. In addition, the polyester-based fiberfor artificial hair preferably has a fineness of 10 to
100 dtex, more preferably 20 to 90 dtex, and even more preferably 35 to 80 dtex because the fineness within the above-describe range is suitable for artificial hair.
The polyester-based fiber for artificial hair of the présent invention has favorable flame retardance and heat résistance.
The flame retardance of the polyester-based fiber for artificial hair can be determined based on the
LOI value and whether or not dripping occurs during a combustion test. Measurement of the LOI value and the combustion test can be performed in the manners that will be described later. In light of the excellent flame retardance of the polyester-based fiber for artificial hair, it is préférable that the LOI value is 23 or more and no dripping occurs in the combustion test, and it is more préférable that the LOI value is 25 or more and no dripping occurs in the combustion test.
The heat résistance of the polyester-based fiber for artificial hair can be determined based on the heat shrinkage percentage at 220°C that is measured with a TMA (thermal strain and stress measuring apparatus) and whether or not the fiber is softened and/or crimped by application of heat with a hair iron at 220°C. Measurement of the heat shrinkage percentage at 220°C with a TMA and application of heat with a hair iron at 220°C can be conducted in the manners that will be described later. It is préférable that the heat shrinkage percentage at 220°C of the polyester-based fiber for artificial hair that is measured with a TMA is less than 5% in light of excellent heat résistance. Moreover, it is préférable thatthe fiber is not crimped, more preferably the fiber is not softened, by application of heat with a hair iron at 220°C. It is particularly préférable that the heat shrinkage percentage at 220°C that is measured with a TMA is less than 5%, and application of heat with a hair iron at 220°C does not cause any change in the extemal appearance and texture of the fiber. The excellent heat résistance enables curi setting and the like to be preferably performed with a heat instrument for beauty treatment, such as a hair iron, at 180 to 240°C.
The polyester-based fiber for artificial hair (multifilament) has littfe fiber fusion. For example, in the case where fiber fusion is evaluated in the manner that will be described later, the number of fused fibens is preferably less than 50 and more preferably less than 10.
In the case where lhe polyester-based fiber for artificial hair of the présent invention is spun-dyed, the fiber can be used as it is. However, in the case where the fiber is not spun-dyed, the fiber can be dyed under the same condition as that of ordinary polyester-based fibers. As a pigment, a dye, an auxiliary, and the like to be used for dyeing, those having weather résistance and flame retardance are préférable.
The polyester-based fiber for artificial hair of the présent invention can be directly used alone as artificial hair. Alternatively, the polyester-based fiber for artificial hair of the présent invention can be used as a fiber bundle for hair by mixing the polyester-based fiber for artificial hair with at least one fiber selected from the group consisting of human hair, animal hair, polyvinyl chloride-based fibers, modacrylic fibers, polyamide-based fibers, polyolefin-based fibers, regenerated protein fibers, and other polyester-based fibers.
The above-described fibers can be mixed as long as the fiber bundle for hair can retain excellent flame retardanœ and heat résistance.
A hair ornament product that is formed using the polyester-based fiber for artificial hair of the présent invention has excellent flame retardanœ and heat résistance. Examples of the hair ornament product include, 10 but not limited to, haïr wigs, hairpieces, weavings, hair extensions, braided hair, hairaccessories, and doit hair.
The hair ornament product may be formed only of the polyester-based fiber for artificial hair of the present invention. The hair ornament product may also be formed by combining the polyester-based fiber for artificial hair with at least one fiber selected from the group consisting of human hair, animal hair, polyvinyl chloride-based fibers, modacrylic fibers, polyamide-based fibers, polyolefin-based fibers, regenerated protein 15 fibers, and other polyester-based fibers.
Examples
Hereinafter, the present invention will be described in more detail based on examples. However, the present invention is not limited to the examples.
The following compounds were used in the examples and comparative examples.
Polyethylene terephthalate 1 (hereinafter also referred to as PET 1 product name RT523 manufactured by Nippon Unipet Co., LtdIV = 0.70
Polyethylene terephthalate 2 (hereinafter also referred to as PET2): product name regenerated
PET' manufactured by Nihon MTC Co., Ltd., IV = 0.47
Brominated epoxy flame retardant 1 (hereinafter also referred to as flame retardant T): product name SRT-20000 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., number-average molecular weight: 40000, an epoxy-terminated brominated epoxy flame retardant
Brominated epoxy flame retardant 2 (hereinafter also referred to as flame retardant 2): product name SRT-2000 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., number-average molecular weight:
4000, an epoxy-terminated brominated epoxy flame retardant
Brominated epoxy flame retardant 3 (hereinafter also referred to as flame retardant 3): product name SRT-1540 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd., number-average molecular weight: 3000, a tribromophenol end-capped brominated epoxy flame retardant
Viscosity-redudng agent 1 : pentaerythritol (manufactured by Wako Pure Chemical Industries, Ltd., number of hydroxyl groups: 4, melting point: 261 °C, boiling point: 276°C)
Viscosity-redudng agent 2: tetrabromobisphenol S (product name S-400 manufactured by Manac
Incorporated., number of hydroxyl groups: 2, melting point: 300°C, boiling point: 320°C) (Examples 1 to 6 and Comparative Examples 1 to 3)
The above described PET 1 or PET2 was dried to a moisture content of 100 ppm or less, and then was dry blended with the above described other compounds in blending ratios shown in Table 1 below. Each ofthe obtained polyester resin compositions was supplied to a twin-screw extrader, melt kneaded at 280°C, and pelletized. The pellets were dried to a moisture content of 100 ppm or less. Next, the dried pellets were supplied to a melt spinnîng machine, and a molten polymer was extruded at 280°C through a spinneret with nozzle holes having a nozzle diameter of0.5 mm and a drcular cross-section. The extruded polymer was cooled to a température of not more than the glass transition température of the polyester resin, and wound up at a speed of 60 to 150 m/min to obtain spun yams. The obtained spun yams were drawn to 3 times the original length at 80°C and heat-treated using a heat roller heated to 200°C. Thus, a polyester-based fiber (multifilament) having a single fiber fineness of about 60 dtex was obtained. It should be noted that in Examples 1 to 4, the intrinsic viscosity of the polyester resin was reduced by the viscosity-redudng agent (sugar alcohol or tetrabromobisphenol S) during melt kneading and/or melt spinnîng of the polyester resin composition.
The intrinsic viscosity of the polyester resins (IV of the polyester resins after being processed into fiber) of the polyester-based fibers obtained in Examples 1 to 6 and Comparative Examples 1 to 3 was measured in the following manner. The results are shown in Table 1 below. Also, the heat résistance, flame retardance, colordevelopment, and fiberfusion ofthe polyester-based fibers obtained in Examples 1 to 6 and
Comparative Examples 1 to 3 were measured and evaluated in the following manners. The results are shown in Table 1.
(IV of Polyester Resin after Being Processed into Fiber)
A polyester-based fiber was dissolved in a mixed solvent of phenol/tetrachloroethane with a weight ratio of 1/1 so that the concentration was 0.25 g/dL, and the IV ofthe polyester resin in the fiberwas measured at25°C.
(Heat Résistance)
Heat résistance was determined by the following four criteria based on the shrinkage percentages at
220°C of the fiber that was measured with a TMAand the texture and external appearance after an end (length: 3 cm) of filaments (total fineness: 150000 dtex, length: 50 cm) was heated for 3 seconds with a hair iron at 220°C.
A: The shrinkage percentage of the fiber is less than 5%, and both the external appearance and the texture of the fiber remain unchanged after heating with the hair iron when compared with those before heating.
B: The shrinkage percentage ofthe fiber is less than 5%, but the fiber is softened, and the texture is slightly hard.
C: The shrinkage percentage of the fiber is 5% or more, a small amount of crimp is observed in the fiber, and the texture tends to be rough.
D: The shrinkage percentage of the fiber is 5% or more, distinct crimps are observed in the fiber, and the texture is significantly rough.
<Measurement of Fiber Shrinkage Percentage at 220°C with TMA>
Filaments (length: 2 cm, ten single yams) were used. The shrinkage percentages at 220°C ofthe fibers were measured with a TMA (thermal stress and strain measuring apparatus, trade name TMA/SS150C manufactured by Seiko Instrumente Inc., working gas: nitrogen, gas flow rate: 30 L/min, rate of température increase: 20°C/min, load: 18 mN). The fiber shrinkage percentage is given by an équation below.
fiber shrinkage percentage (%) = 100-((100* Y)/X] where X is an initial sample length, and Y is a sample length at 220°C.
(Flame Retardance)
Flame retardance was determined by the following four criteria based on the LOI value and whether or not dripping occurred in a combustion test.
A: Dripping does not occur, and the LOI value is 25 or more.
B: Dripping does not occur, and the LOI value is 23 or more and less than 25.
C: Dripping occurs, and the LOI value is 23 or more.
D: Regardless of whether or not dripping occurs, the LOI value is less than 23.
<Measurement of LOI Value>
The LOI value was measured conforming to a method spedfied in JIS L1091 E (oxygen index test).
Specifically, filaments (length: 16 cm, weight: 0.25 g) were lightly tied together at both ends with a double-sided adhesive tape, inserted in a twisting device, and twisted. After the filaments were suffidently twisted, the filaments were folded in half at the middle and twisted together. The résultant filaments were fastened at both ends with a Cellophane (registered trademark) tape so that the overall length became 7 cm. The thus obtained sample was pre-dried at 105°C for 60 minutes and further dried in a desiccator for at least 30 minutes.
The dried sample was adjusted to a certain oxygen concentration. After 40 seconds, the top of the sample was ignited by an igniter with the tgniter flame restricted to 8 to 12 mm. The igniter was removed after the sample ignited. The oxygen concentration at which 5 cm or more of the sample bumed or the sample continued buming for at least 3 minutes was obtained. The test was repeated three times underthe same conditions. Thus, the limiting oxygen index (LOI) was obtained.
«Combustion Test>
First, 0.7 g of filaments that were eut to a length of 150 mm was tied into a bundle. One end of the bundle was damped and fixed to a stand so that the effective length was 120 mm, and the bundle was suspended vertically. A flame of 20 mm was applied to the fixed filaments bundle for 3 seoonds to cause the filaments bundle to bum, and whether or not dripping occunred was observed.
(Color Development)
A tow filament having a length of 30 cm and a total fineness of 100000 dtex was visually observed in the sunlight, and color development was evaluated by the following four criteria by comparison with the extemal appearanœ of human hair.
A: The hue of the fiber is dear and similar to that of human hair.
B: The fiber is somewhat doudy, and its color is slightly less dear in oomparison with the extemal appearanœ of human hair.
C: The fiber is doudy, and its color is less dear in comparison with the extemal appearanœ of human hair.
D: The fiber is strongly doudy, and its color is distinctiy less dear in comparison with the extemal appearanœ of human hair.
(Fiber Fusion)
Twenty fiber bundles (length: 50 cm, weight: 136 g) were combed at least 30 times by running a œmb made of a polyaœtal resin (trade name NEW DELRIN COMB No. 826 manufactured by Uehara Cell) from a point 3 cm below the top of the fiber bundles down through it at a speed of 0.3 m/s. Fiber fusion was determined as follows based on the number of fused fibers that were caught in the comb.
A: The number of fused fibers is less than 10.
B: The number of fused fibers is 10 or more and less than 50.
C: The number of fused fibers is 50 or more and less than 100.
D: The number of fused fibers is 100 or more.
Table 1
| Ex. 1 | Ex. 2 | Ex. 3 | Ex. 4 | Ex. 5 | Ex. 6 | Com. Ex. 1 | Com. Ex. 2 | Com. Ex. 3 | |
| PET1 (parts by weight) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | ||
| PET 2 (parts by weight) | 100 | 100 | |||||||
| Flame retardant 1 (parts by weight) | 20 | 20 | |||||||
| Flame retardant 2 (parts by weight) | 20 | ||||||||
| Flame retardant 3 (parts by weight) | 20 | 20 | 20 | 20 | 20 | ||||
| Viscosity-reducing agent 1 (parts by weight) | 3 | 3 | 3 | 5 |
| Viscosity-reducing agent 2 (parts by weight) | 3 | ||||||||
| IV of polyester resin after being proœssed into fiber | 0.40 | 0.45 | 0.40 | 0.40 | 0.38 | 0.47 | 0.62 | 0.28 | 0.65 |
| Fiber shrinkage percentage (%) | 2 | 2 | 2 | 2 | 2 | 3 | 9 | 1 | 11 |
| Heat résistance | A | A | A | A | A | A | D | B | D |
| LOI value | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 24 | 21 |
| Dripping | Does not occur | Does not occur | Does not occur | Does not occur | Does not occur | Does not occur | Does not occur | Occurs | Occurs |
| Flame retardance | A | A | A | A | A | A | A | C | D |
| Color development | A | A | A | B | B | C | A | C | A |
| Number of fused fibers | 8 | 7 | 31 | 2 | 9 | 3 | 5 | 22 | 0 |
| Fiber fusion | A | A | B | A | A | A | A | B | A |
As can be seen from the results shown in Table 1 above, the polyester-based fibers of Examples 1 to
6, in each of which the polyester resin (after being proœssed into fiber) had an IV within a range of 0.3 to 0.5, had favorable flame retardance and heat résistance. As can be seen from comparisons of Examples 1 to 3 with Example 4 and a comparison between Examples 5 and 6, in the cases where a brominated epoxy flame retardant having a number-average molecular weight within a range of 1000 to 20000 was used, the color development was improved. As can be seen from comparisons of Examples 1 to 3 with Example 5 and a comparison between Examples 4 and 6, the polyester-based fibers obtained by reducing the IV offrie polyester resin before being processed into fiber using a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in the molécule and having a melting point of 80°C or more and a boiling point of 260°C or more as the viscosity-redudng agent to adjust the IV ofthe polyester resin after being processed into fiber to a range of 0,3 to 0,5 exhibited superior color development As can be seen from comparisons of Examples 1 and 2 with Example 3, in the cases where a brominated epoxy flame retardant having a low number-average molecular weight of 1000 to 20000 was used, fiber fusion in the case where the brominated epoxy flame retardant had tetrabromobisphenol A at the end of the molécule was less than that in the case where the brominated epoxy flame retardant had an epoxy group at the end of the molécule.
On the other hand, the polyester-based fibers of Comparative Examples 1 and 3, in each of which the polyester resin after being processed into fiber had an IV of more than 0.5, had poor heat résistance. Moreover, the polyester-based fiber of Comparative Example 3, which did not contain a brominated epoxy flame retardant, also had poor flame retardance. The polyester-based fiber of Comparative Example 2, in which the polyester resin after being processed into fiber had an IV of less than 0.3, was Inferior to the polyester-based fibers ofthe examples in both the flame retardance and the heat résistance.
The invention may be embodied in other forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed in this application are to be considered in ail respects as illustrative and not limitîng. The scope of the invention is indicated by the appended daims rather than by the foregoing description, and ail changes which corne within the meaning and range of equivalency of the daims are intended to be embraœd therein.
Claims (6)
- WHAT IS CLAIMED IS:1. A polyester-based fiber for artificial hair comprising a polyester resin and a brominated epoxy flame retardant,5 wherein the polyester resin is polyalkylene terephthalate and/or a copolymerized polyester containing polyalkylene terephthalate as a main component, and the polyester resin has an intrinsic viscosity of 0.3 to 0.5.
- 2. The polyester-based fiber for artificial hair according to daim 1, wherein the brominated epoxy flame 10 retardant has a number-average molecular weight of 1000 to 20000.
- 3. The polyester-based fiber for artificial hair according to daim 1 or 2, comprising 0.1 parts by weight or more and less than 5 parts by weight of a viscosity-redudng agent with respect to 100 parts by weight of the polyester resin, the viscosity-redudng agent being a sugar alcohol and/or a bisphenol-based compound15 containing two or more hydroxyl groups in a molécule and having a melting point of 80°C or more and a boiling point of 260°C or more.
- 4. A method for produang the polyester-based fiberfor artifiaal hair according to any one of daims 1 to3, the method comprising:a step of redudng an intrinsic viscosity of a polyester resin using a viscosity-redudng agent, the viscosity-redudng agent being a sugar alcohol and/or a bisphenol-based compound containing two or more hydroxyl groups in a molécule and having a melting point of 80°C or more and a boiling point of260°C or
- 5 more.5. A fiber bundle for hair comprising:the polyester-based fiber for artifidal hair according any one of daims 1 to 3, and at least one fiber selected from the group consisting of human hair, animal hair, polyvinyt chloride-based fibers, modacrylic fibers, 10 polyamide-based fibers, polyolefin-based fibers, regenerated protein fibers, and other polyester-based fibers.
- 6. A hair omament product comprising the polyester-based fiber for artifidal hair according to any one of daims 1 to 3.15 7. The hair omament product according to daim 6, further comprising at least one fiber selected from the group consisting of human hair, animal hair, polyvinyl chloride-based fibers, modacrylic fibers,
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP2013-196848 | 2013-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA16745A true OA16745A (en) | 2015-12-14 |
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